/* 전체 레이아웃 */
body {
  font-family: 'Noto Sans KR', sans-serif;
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #f0f4f8, #ffffff);
  color: #333;
  line-height: 1.7;
}

/* 헤더 */
header {
  background: linear-gradient(135deg, #3498db, #2c3e50);
  color: #fff;
  padding: 3rem 2rem;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
header h1 {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 700;
}
header p {
  margin-top: 0.5rem;
  font-size: 1.2rem;
  opacity: 0.9;
}

/* 섹션 */
section {
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
section:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}
section h2 {
  color: #2c3e50;
  margin-bottom: 1rem;
  border-left: 5px solid #3498db;
  padding-left: 0.7rem;
  font-size: 1.5rem;
}

/* 리스트 */
ul {
  list-style: none;
  padding: 0;
}
ul li {
  margin-bottom: 0.8rem;
  padding-left: 1.5rem;
  position: relative;
}
ul li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: #3498db;
  font-weight: bold;
}

/* 특별 이벤트 */
.highlight {
  background: linear-gradient(135deg, #eaf6ff, #ffffff);
  border-left: 5px solid #3498db;
  padding: 2rem;
  margin-top: 2rem;
  border-radius: 12px;
  animation: fadeIn 1s ease-in-out;
}
.highlight h2 {
  color: #3498db;
}

/* CTA 버튼 섹션 */
.cta {
  max-width: 900px;
  margin: 2rem auto;
  padding: 2rem;
  background: linear-gradient(135deg, #fff3e6, #ffffff);
  border-left: 5px solid #e67e22;
  border-radius: 12px;
  text-align: center;
}
.cta h2 {
  margin-bottom: 1rem;
  color: #e67e22;
}

/* 버튼 */
.btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.9rem 2rem;
  background: #3498db;
  color: #fff;
  border-radius: 30px;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  max-width: 100%;   /* 화면 밖으로 안 나가게 */
  box-sizing: border-box;
}
.btn:hover {
  background: #2980b9;
  transform: scale(1.05);
}

/* 푸터 */
footer {
  text-align: center;
  padding: 1.5rem;
  background: #2c3e50;
  color: #fff;
  margin-top: 3rem;
  font-size: 0.9rem;
  opacity: 0.8;
}

/* 애니메이션 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}


@media (max-width: 768px) {
  header h1 {
    font-size: 1.8rem;
  }
  section {
    margin: 1rem;
    padding: 1rem;
  }
  .btn {
    width: 100%;
    padding: 1rem;
  }
}

@media (max-width: 480px) {
  .btn {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
  }
  header h1 {
    font-size: 1.5rem;
  }
  header p {
    font-size: 1rem;
  }
  .cta {
    margin: 1rem;       /* 좌우 여백 확보 */
    padding: 1.5rem;    /* 내부 여백은 조금 줄여서 균형 맞추기 */
  }
}